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<h3>What if you drain the sea?</h3>
<p>Author:Jack</p>
<p>Q. How quickly would the oceans drain if a circular portal 10 meters
<br>in radius leading into space were created at the bottom of Challenger Deep,
<br>the deepest spot in the ocean? How would the Earth change as the water was being drained?</p>
<p>A. I want to get one thing out of the way first:</p>
<p>According to my rough calculations, if an aircraft carrier sank and got stuck against the drain,
the pressure would easily be enough to fold it up and suck it through.Haha!</p>
<p>How far away is this portal? If we put it near the Earth, the ocean would just fall back down into the atmosphere.
As it fell, it would heat up and turn to steam, which would condense and fall right back into the ocean as rain.
The energy input into the atmosphere alone would also wreak all kinds of havoc with our climate, as would the huge clouds of high-altitude steam.</p>
<p>So let's put the ocean-dumping portal far away-say, on Mars. (In fact, I vote we put it directly above the Curiosity rover;
that way, it will finally have incontrovertible evidence of liquid water on Mars's surface.)</p>
<p>What will happen to the Earth?</p>
<p>Not much. It would actually take hundreds of thousands of years for the ocean to drain.</p>
<p>Even though the opening is wider than a basketball court, and the water is forced through at incredible speeds,
the oceans are huge. When you started, the water level would drop by less than a centimeter per day.</p>
<p>There wouldn't even be a cool whirlpool at the surface-the opening is too small and the ocean is too deep.
(It's the same reason you don't get a whirlpool in the bathtub until the water is more than halfway drained.)</p>
<p>But let's suppose we lose our temper and speed up the draining by opening more drains,so the water level starts to drop more quickly.</p>
<p>Let's take a look at how the map would change.</p>
<p>At first it looked like this:</p>
<img src="/static/img/what_if_sea1_1.jpg">
<p>This is what happens when the sea level drops 50 meters:</p>
<img src="/static/img/what_if_sea1_2.jpg">
<p>The two pictures look similar, but in fact there are some differences.
Sri Lanka, New Guinea, Britain, Java Island and Borneo are now connected by land to their neighbors.</p>
<p>After 2000 years, the Netherlands finally rose above sea level and became dry land. Without the constant threat of catastrophic floods,
the Dutch were finally able to focus on outward expansion, so they immediately poured out and declared sovereignty over the newly exposed land.</p>
<img src="/static/img/what_if_sea1_3.jpg">
<p>After a 100 meter drop in sea level, a huge Island appeared on the coast of Nova Scotia, Canada, which was previously a great shoal.</p>
<p>You may have noticed something unusual: not all oceans are shrinking. The Black Sea, for example, shrinks a little bit, and then it doesn't get smaller.</p>
<p>This is because the water is no longer connected to the ocean. As the water level dropped, some basins emerged, cutting off the water in them from the sea.
The water flowing out of these basins may "dig" a channel deeper than the basins, so that the water can continue to flow out,
depending on the structure of the seabed. But most of the basin's water is so surrounded by the mainland that it will not flow out again.</p>
<img src="/static/img/what_if_sea1_4.jpg">
<p>When the sea level drops 200 meters, the map of the world looks strange. New islands have sprung up, Indonesia has become a huge island,
and the Dutch control more than half of Europe.</p>
<img src="/static/img/what_if_sea1_5.jpg">
<p>Japan is now an isthmus connecting the Korean Peninsula and Russia. New Zealand has added new islands. The Dutch continued to expand northward.</p>
<img src="/static/img/what_if_sea1_6.jpg">
<p>New Zealand is getting bigger and bigger. The Arctic Ocean is isolated and the water level is no longer falling.
The Dutch crossed the newly formed land bridge to North America.</p>
<img src="/static/img/what_if_sea1_7.jpg">
<p>The sea level has dropped by 2000 meters. New islands sprang up from left to right.
The Caribbean and the Gulf of Mexico will soon be separated from the Atlantic Ocean. I don't know what New Zealand is doing.</p>
<img src="/static/img/what_if_sea1_8.jpg">
<p>As sea levels fell by 3000 meters, many of the peaks of mid ocean ridges - the longest mountain range in the world - began to surface.
Many long strips of new land began to appear.</p>
<img src="/static/img/what_if_sea1_9.jpg">
<p>So far, most of the world's oceans are no longer connected to each other, and the drainpipes are running out of water.
As for the exact location and size of the emerging inland sea, it is difficult to predict. The above figure is only a rough estimate.</p>
<img src="/static/img/the_end_of_the_sea.jpg">
<p>The picture above is the map of the world after all the water that can flow is finished. There is still a lot of water left.
Although most of the water is very shallow, there are still trenches as deep as four or five kilometers.</p>
<p>Pumping half of the ocean's water will have an incalculable impact on climate and ecosystems,
but it is certain that the ecosystem will collapse and a large number of species will die out.</p>
<p>It is possible that we humans will survive, but we will have to face up to such a scene:</p>
<img src="/static/img/Holland_world.jpg">
<p>P.S.It isn't the end of the story!</p>
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